歸天

#!/bin/sh
SHOW_DESKTOP='/apps/nautilus/preferences/show_desktop'
GCONF_GET='gconftool --get'
GCONF_SET='gconftool --set'
ARGS='--type boolean'

if [ `$GCONF_GET $SHOW_DESKTOP` = "true" ] ; then
    $GCONF_SET $SHOW_DESKTOP $ARGS false
else
    $GCONF_SET $SHOW_DESKTOP $ARGS true
fi

#!/bin/bash

case "$1" in
  start)
           # Describe start commands here
        ;;
  stop)
           # Describe stop commands here
        ;;
  restart)
           # Describe restart commands here
        ;;
  *)      # No parameter specified
        echo "Usage: $SELF start|stop|restart|reload|force-reload|status"
        exit 1
        ;;
esac

exit 0

#!/bin/bash

#### Check the "Image of the Day Gallery" of NASA
#### If there's a new gallery in it download it and change the background
### working on tmp directory ###
cd /tmp

### Global variables
LOCAL_FILE_PATH="/home/maya/Desktop/DATA/media/Pictures/" # Image download path

BASE_URL="http://www.nasa.gov/"
RETURN_VAL=       # For big return values

### uncomment one image size
## image size suffix
# SIZE=600 # 800x600
# SIZE=768 # 1024x768
#SIZE=1200 # 1600x1200
SIZE=full # full high resolution

function get_latest_image_number () {
    local temp_file=`tempfile`
    local temp_file2=`tempfile`
    local gallery_url="http://www.nasa.gov/multimedia/imagegallery/" # nasa image gallery page
    wget -o $temp_file $gallery_url -O $temp_file2 # try downlaod and logging

    ## Find latest image number
    img_number=`grep -o "multimedia/imagegallery/image.*.html" $temp_file2 | \
    awk -F"[_ .]" 'BEGIN {max=0} {if($3>max) max=$3} END{print max}'`

    ## remove temporary file
    rm $temp_file
    rm $temp_file2
    RETURN_VAL=$img_number
}

## check if user gconf has "nasa_image_key"
function has_nasa_image_key () {
    local has_key=`gconftool -a /desktop/gnome/background | grep nasa_image_key`
    if [[ $has_key != "" ]];
    then
	RETURN_VAL=1
    else
	RETURN_VAL=0
    fi
}

## set nasa_image_key to image number
## args : $1 => image number
function set_nasa_image_key () {
    if [[ $1 = "" ]];
    then
	echo "Invalied argument"
    else
	gconftool --set --type integer /desktop/gnome/background/nasa_image_key $1
    fi
}

function get_nasa_image_key () {
    RETURN_VAL=`gconftool --get /desktop/gnome/background/nasa_image_key`
}

function set_background () {
    if [[ $1 == "" ]];
    then
	echo "Invalied argument"
    else
	local html_file_url="${BASE_URL}multimedia/imagegallery/image_feature_"${1}".html"
	local temp_file=`tempfile`
	local temp_file2=`tempfile`
	local url_prefix="images/content/"

	wget -o $temp_file $html_file_url -O $temp_file2 # try downlaod and logging

	local file_name=`grep -o "[^\/]*${SIZE}.jpg" $temp_file2` # full image download url
	local img_url=${BASE_URL}${url_prefix}${file_name}

	echo $img_url
	echo $file_name
	wget -o $temp_file ${img_url}

	mv $file_name $LOCAL_FILE_PATH
	gconftool --set --type string /desktop/gnome/background/picture_filename ${LOCAL_FILE_PATH}${file_name}

        ## remove temporary files
	rm $temp_file
	rm $temp_file2
    fi
}

function update () {
    has_nasa_image_key
    local has_key=$RETURN_VAL

    if [[ $has_key = 1 ]];
    then
	get_nasa_image_key
	local my_key=$RETURN_VAL

	get_latest_image_number
	local latest_key=$RETURN_VAL

	if [[ $my_key < $latest_key ]];
	then
	    set_background $latest_key
	    set_nasa_image_key $latest_key
	else
	    exit 0
	fi
    else
	get_latest_image_number
	local latest_key=$RETURN_VAL
	set_nasa_image_key $latest_key
	set_background $latest_key
    fi
}

update ## try update